2218390709 has 2 divisors, whose sum is σ = 2218390710. Its totient is φ = 2218390708.

The previous prime is 2218390667. The next prime is 2218390723. The reversal of 2218390709 is 9070938122.

It is a happy number.

2218390709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2206932484 + 11458225 = 46978^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218390709 - 2⁸ = 2218390453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2218390309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109195354 + 1109195355.

It is an arithmetic number, because the mean of its divisors is an integer number (1109195355).

Almost surely, 2^2218390709 is an apocalyptic number.

It is an amenable number.

2218390709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218390709 is an equidigital number, since it uses as much as digits as its factorization.

2218390709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 2218390709 is about 47099.7952118690. The cubic root of 2218390709 is about 1304.2054555783.

The spelling of 2218390709 in words is "two billion, two hundred eighteen million, three hundred ninety thousand, seven hundred nine".